摘要
针对车用电子系统容量扩大和传统PWM整流器缺点问题,为实现输入单位功率因数和一级降压整流,去除死区时间引起的谐波带来的影响,本文提出一种新型基于42V PowerNet的车用双向AC-DC矩阵变换器。在基于三相-三相矩阵变换器理论基础上,推演出AC-DC矩阵变换器的整流调制策略,并研究了开关序列和换相的方法,采用优化AV法调制策略来控制整流器。运用四步换流策略解决了开关换相存在的短路、断路风险和死区时间问题,仿真和实验结果验证了车用新型AC-DC矩阵式整流器的有效性和正确性。
The expansion of automotive electronic system and the disadvantage of the conventional rectifier should not be ignored.To achieve unity power factor and complete the step-down rectification in single stage,this paper presents a new type of AC-DC matrix converter with 42V for automotives.It removed the impact of harmonics which is caused by the dead time and reduced the cost of the system.In this paper,the modulation strategy of AC-DC matrix converter derived from that of three-phase – three-phase matrix converter and the methods of commutation are studied.The optimized modulation strategy named AV method is used to control the switch-state.The four-step commutation strategy is a solution of the risks for short circuit,open circuit and the dead-time problem.The experimental results based on DSP system and the simulation results demonstrate the validity and effectiveness of the system.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第8期64-70,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50777013)
